Interrupter.



P'ENTBD APR. 28, 1908, I

A. R. LUSUHKA,

INTBRRUPTER. APLIOLTION ULEB D 3 SHBETS-SHEET 2.

PATENTBD APR. 28, 1908.

A. R. LUSCHKA.

NTERR APPLICATION FILED DBO. 11, 1905.

UPTER.

s SHEETS-SHEET 3L llllm UNITED STATESPAIllJ-ilhl' ERICE.

AUGUST R. LUSCHKA, OF RIVER FREST, LLINOIS, ASSlGNR T WESTERN ELECTRIC COM- IANY, OF CHICAGO, ILLINOIS, A CQRPGRATION OF ILLIOIS.

INTERRUPTE Specification of Letters 'latented April. 98, 1908.

Application filed December 1l, 1905. Serial Elin QLQF.

To all whom it may concern."

Be it known that I, AUGUST It. Lussuria, citizen of Svviterland,,residinir at River llorest, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Interrupters, of Wliich the following is a full, clear, concise, vand exact description.

My invention relates to pole changers for transforming direct current into pulsating or alternating current, and has for its object to provide an improved and siinplied device capable of permanently secure assembly, easy and complete adjustment without resorting tothe bending of springs and without danger of short circuits, and furthermore, to accomplish these desirable results in a struc ture compact as is compatible with eliicient operation..

I will describe my invention by reference to the accompanying drawings, which illustrate the preferred embodiment thereof, res rving for the appended claims a statement oi: the

arts, improvements angl combinations which Iconsider novel with me.

In the drawings, Figure 1 is a plan view of a pole'l changer embodying my iii-venti vwith the cover of the cf. ing case swung open; Fig. 2 is a heut/cin v of the pole c anger, with the lower base plate removed, to show the hollow base, Within which may be mounted condensers and resistance coils, Fig. 3 is a sectional View on line SW3 of l? 2, 'showing a portion of the hollow base and the manner which the terminals are insulated and locked in place. Fig. 4 is a transverse sectional view on line 4 4 of Fig. 1; and Fig. 5 is a diagram illustrating the circuit connections of ,the device.

Similar letters of reference designate like arts throughout the several figures of the rawings.

The vibrating arm a ofthe pole changer is pivoted at o to a lug carried by the base t ot the containing case b, said. arm being open ated by an electromagnet c in the Well-known manner. The arm c carries two Contact iingers d d insulated. from the arm and projectlng angularly therefrom, preferably at right angles, one linger being mounted on each side ofthe arm. Said lingers d d have associated therewith pairs of contact springs e e andff ach finger when moved hy the respectiv arni a intel itly engaging the springs es @crates The free ends ol said bent'to lie in. radial troni the p tal point ci' the vibratory and the sp e e', f j" which are mounted on edge lie in substantially radial lines yfrom said pivotal point, 'the free ends' of the springs of' each pair lying parallel to the tree end of their aperating finger and. en opposite sides thwuiif.l This ian-shaped arrangement ci the contact springs, 'fingers and arm, laid out with regard to a given center, provides a striking contact between the lingers and. springs and eliminates the objectionahle sliding o' the contacts on each other.

l provide a supporting post g for each swing, said post being secured to the hase b, tA springs being laterally adjustable u on said posts to var y thei' separation from t eir operating lingers. The fixed end 7i, of Yeach spring is preferably bent to lie at right anglesA to t. body ci the spring, and is adapted to move longitudinally in a groove g in the rear de of the post supporting such spring, so as zo move c l?? or other suitable fasdto be passed through .i trie por radi@ ated position. Vith this arrange-y ment, the springs may ybe readily adjusted while 'the dr is in operation.; if desired, Without danger ol short circuiting the springs, since each spring .has its individual supporting post, and the posts are necessarily mounted, inV order to hold the springs in proper radial position, 'tar enough apart to peri'nit convenient access to said posts and springs, while at the saine time the structure .is very compact. lfllhen adjusted in any position, the springs are held lirnily in such position.

In I have shown a set of circuit con nec'tions le the pole changer herein described as embodyingL my ii'ivention. ne linger is grounded by conductor i, and the other iin- Z/ is connected 'with a conductor leading to the alternating circuit terminal oit the in strument. source ol direct current G is illustrated, the positive pole thereof being t to secure the spring in lconnected by a conductor 3 with the positive pulsating current terminal of the instrument, sprin s e f forming the terminals of branc es leading from saidconductor. The negativepole is connected with a conductor 4 which leads to the negative pulsating current terminal of the instrument, sprin s e forming terminals'of branches from sai conductor.' Thus when the arm-is in the position shown, the negative pole is rounded by Way of conductor 4,. spring e, iginger d and conductor 1, and a positiveimpulse delivered to the positive pulsating terminal of the instrument by Way of conductor 3, a positive impulse being also delivered by Way of conductor 3, spring f finger d and conductor 2, to the alternating current terminal. When the arm is in its alternativeposition, with iingers d d engagin springs e f res ectively, positive pole o battery G is groun ed, and a. negative impulse delivered to both the negative pulsating terminal of the instrument andthe alternating current terminal thereof I preferably provide condensers i and resistances 7c in association with the circuits of the instrument to prevent sparking at the contacts, as shown in Fig. 5, and these parts may be compactly mounted With the hollow base b of the case b, asshown in Fig. d,` the base being close by a plate b.

In a ole changer, the combination with a base, o a vibratary |arm carried thereby, i11-` sulated-angularly disposed contact fingers mounted on edge associated with each er, adapted to be intermittently connected with said in er in the operation of said arm, the free en s of each pair of springs lying on opposite sides of its associated inger, and a supporting post for each spring, the fixed end of each 'sprlng being bent at right angles to the body of saidspring to slide in a groove in the rear side of its sup rting post to vary the distance between t e free end of said spring and its associated finger, the said angular end of the spring being longitudinally slotted, and a screw passingl through. said' slot into the post to secure t ad'usted position.

n Witness whereof, I, hereunto subscribe my name this 2nd day of December, A. D.

AUGUST R. LUSCHKA. Witnesses:

R. W. INGnRsoLL,

BEAUBIEN.

e spring 1n an f carried by said arm, a pair of contact s rings 

